This entry was published at least two years ago (originally posted on April 19, 2018). Since that time the information may have become outdated or my beliefs may have changed (in general, assume a more open and liberal current viewpoint). A fuller disclaimer is available.
With Labyrinth getting mentioned a lot due to the upcoming theatrical event, I think it’s worth linking to this excellent fan theory about the story’s background. “…of course she’s Sarah. They were all Sarah.”